Tire-filler.



i T IN; with "ermine Parana. ora ion;

DELLA I1. CLARK, or n niii reriemfenenemn.

TIRE-FILLER.

. No Drawing.

' Specification of Letters Eatent.

Application filed September 18,-1912. Serial N 0. 720,994.

. To all whom it may concern: I

rubber 100 pounds, water 200 pounds, potas- Be it known that L DELLA L. CLARK, citizen of the United States, residing at Birmingham, in the county of Jefferson and State of Alabama, have invented new and useful Improvements in Tire- Fillers, of

which the following is a specification.

This invention relates to a process of producing rubber-like substancespossessing ten;

sile strength, durability, elasticity and resiliency, and capable of use for many purposes asaa substitute for rubber, and particularly as an elastic filler for pneumatic tires. i

The object of the invention is to provide a substance of the character described which will be highly resilient, which will not harden or otherwise deteriorate from age or continuous use, and which maybe conveniently molded or filled into a tire.

A further object of the invention is to provide a process of manufacture whereby; a composition of i this character may be readily and efficiently made. 7

The improved composition eon ists substantially of glue, 100 pounds, ge 'atin' 100 pounds, glycerin 200 pounds, pure. india sium chromate about 1.56 pounds, lamp black .015 pound, wood tar 25 pounds, formaldehyde 1 pound, hydrogen peroxi'd 2 'pounds, ground cork sufficient to constitute 5% of the mass, and molasses. These pro-' portions, while approximately necessary, maybe varied to'a certain extent according tothe'amount of elasticity required and to other variations-in the product according to the uses to-which it. is to 'be' put,

, 'In-preparing the composition, the potas sium chromate and. lamp black are first mixed with molasses, in the proportion of 1 pound of the'chromate to a quart of molasses. I then add thereto the formaldehyde,

combined with-water in the proportion of-lO ounces of formaldehyde'to 3 ounc'es water, and afterward add to the mixture the rubber 0r caoutchouc dissolved in naphtha, oil

ofturpentine or other suitable solvent. I now take the glue,igelatin and water and place the same in a vat, the glue and gelatin being allowed to soak in the'water fora period of half a day. 'When the'composition is to be made, the glycerin is placed in a steam jacketed kettle and heated to the boiling point of water a fter which the mixture of glue and gelatin is added thereto,

after which the composition so far prepared is drawn off into molds or onto conven-iently sized slabs for storage for future u se. a

When it is desired to use the composition above made, a desired amount is placed in V Patent-Ben t. so, we;

a steam jacketed kettle or other convenient vessel and heated to a temperature about 170 F., after which the mixture-of potassium' chromate, lamp black and molasses is added thereto and thoroughly combined therewith. The composition thus finally 'prepared is now ready to'be forcedainder pressure into a; tire, forin or mold, after which it is heated to a temperature of about 150 F. for-a period of about 5 hours, or untilthe ingredients are thoroughly cooked and the moisture driven off. I

In filling automobile tires; the usual air .valve may be replaced bya tube of larger diameter, so that the composition in a liquid condition may flow freely into the tire under a pressure of from 760' to pounds per square inch. "After the composition solidifies it has substantially the density or consistency of rubber, is similar thereto in appearance, and possesses practically all the characteristics of rubber in i point of tensile strength, durability, in elasticit and resiliency. 1 I I T e wood taris an important element 111 this combination as, it serves to toughen the composition and to impart to the same the 7 appearance of rubber, The formaldehyde prevents fermentation of the ingredients of the composition, and at the same time givesit' a leathery consistency. Y a

'It' 's well known that compositions of glue, gelatin and potassium chromate are liable to become hardened and brittle, andv that on account of'the presence, of sulfites in glue and gelatin the composition is liable to set very rapidly under the action of the chromate, when the sulfites come in contact therewith. By the useof. thewood tar,

composition to become hard and brittle is .rubber and molasses, this tendency of the Overcome and the composition caused to retain a permanently high degree of elasticity and resiliency, while the molasses also acts as a retarding agent to check the setting of the composition until it can be molded. lhe hydrogen peroxid acts as aneutralizing agent to also prevent the sudden setting of the mixture when the potassium chromate comes in contact with any sulfites which may be presented in the mass.

I claim:-

1. A rubber substitute containing glue, gelatin, glycerin, rubber, potassium chromate, wood tar, formaldehyde, and hydrogen peroxid in proportions suitable for forming a rubber substitute.

2. A rubber substitute consisting essentially of glue, gelatin, glycerin, rubber, potassium chromate, wood tar,'formaldehyde, hydrogen peroxid and molasses in propertions suitable for forming a rubber substi-' lution of potassium chromate and molasses sufficient in amountto dissolve the chromate, adding thereto asolution of formaldehyde and Water, adding to the mixture thus produced rubber or caoutchoue dissolved in asuitable solvent, making a mixtureof glue, gelatin and water, heatinv glycerin to the boiling point of water, adding thereto the mixture of glue, elatin and water and thoroughly stirring the mass, addin thereto the formaldehyde, and rubber so utions, and the hydrogen peroxid and wood tar, thoroughly stirring and mixing the mass, allowing the mass to cool and solidify liquefying the mass by the action of heat, adding thereto the mixture of potassium chromate and molasses, and heating the mass at a predetermined pressure for a determined period.

5. A composition of the character described formed of the following ingredients in substantially the proportions named, to wit: glue 100 pounds, gelatin 100 pounds, glycerin 200 pounds, rubber 100 pounds, water 200 pounds, potassium chromate 1.56 pounds, lam-p black, '.01-5 pound, wood-tar 25 pounds, formaldehyde 1 pound, hydrogen p'eroxid 2 pounds, molasses sufiicient to dissolve the chromate, and cork about 5% of the mass.

In testimony whereof I afiix my signature in presence of two witnesses.

DELLA L. CLARK. Witnesses:

IVEY F. LEWIS, HENRY A. CLARK. 

